Can Anyone Explain The Purpose?

I am not a big gun person, but I do play quite a few FPS gun games.  In most of them the guns have multiple accessories.  One of the biggest accessories that I have seen on the guns in the games that I play is a holographic sight kind of similar looking to the eotech magnifier pictured below.  As a matter of fact in Call of Duty Black Ops you can even customize the colors, and shapes in the holographic sight.  What I don’t understand is the need for “holographic” images instead of the real thing.  When you are shooting you aren’t shooting holograms, so what is the purpose?

Keep in mind that I am a total rookie when it comes to guns, so please don’t think that I am asking a stupid question.  I am only asking because I honestly don’t understand.

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2 Responses to Can Anyone Explain The Purpose?

  1. They are not ellaborated on in the books. They are apparently for making your target look better.

  2. What does the instruction book say?